<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      body {
        background: url(./images/desktop_1.jpg) no-repeat top center;
      }
    </style>
  </head>
  <body>
    <script>
      let fn = function (N, M) {
        return Math.floor(Math.random() * (M - N + 1)) + N
      }
      const random = fn(1, 10)
      // console.log(random)
      document.body.style.background = `url(./images/desktop_${random}.jpg) no-repeat top center`
    </script>
  </body>
</html>
